Where are the node descriptors for ZEDs kept in BeeStack ZC device?

First, I seem to not get any support at all about BeeStack however I keep coming back since there are no any other source available. I will try my luck once more;

Does the coordinator keep all node descriptors by default in its NVM or cache? If not how can I enable it to request node descriptors from each end device that connects to its network and save them in a table somewhere.